Valve.



S. L. KNEASS.

VALVE.

APPLICATION FILED NOV. 19, 1913.

1,1 1 1,391 Patented Sept. 22, 1914.

em W wa Ph' a-ie d ee o ren sy na in: vented anew and usefullmprovement T clear, and exact description, reierence being had to a the I accompanying 1 drawings, 1 which 'r id y is ne e a y t9 ha e an obst t-"- 1 ins d ee whichs n r; the wnt eliq i he r nt fleas. i os m y I mplished by at alv o r ira ng n, e r pe u p ovided. w h; mean fo les' pa o re e i gt i fw a a eway h re n, When: the attrition of the .lmoving fluid 1 or material heldin suspension; [it :causes ap yi rw ndi ei e r q he atin or. alvesns me ns i i 'iedran us a parts may be easily and individually' replaced. It i'salso an advantagefif the op- Grati tem tit o wh n; ti i o a h s l in in t eh wr asi tbe S p e an pr id d WW Q eene n -Ineans permitting'a certain a: ntbf mo tion between the parts to permit accurate and 'close contact between theg reniovable, valve and its seat, 1 independent: of the acfl [curacyof alinement of thepartsy lt' is also eratorand to nsure" the continuous opera fluid is supplied, that there be no risk of the separation of the valve andits stein in servieevand that replacement after service wear should be inexpensiveyitis a furthered-- vantage" "and an element of j safety if they cannot be removed by accident orordinary I means, yet possess flexibility of seating when there beta losslof a'li'nernent between the operating'stem and the valveseat;

The objects of my ention are to provide a valvevfor the'regulation and. control of fluid pressure with an operating vstem "I securely but notflrigidly connectedyto at-- tachjthe. valve to stem j so that it cannot become separated fromits stein in service and is under such-condition unreinovabley y and to 'relievethe strainupon the connecting means during the operation of closing the 1valve andfihen bressure is exerted fierce i i i pr ferr pert y in wi ln; ii 'va v i ili alapp ied, ov gvalv rcasi gs e po edrin a 1-4:. id 'res agew x-i I g: 1. iswa s l n oflthe valve and valve stern withzthe valve ine' 3,;: F 2- F g-A l st-= P n V e v i he pr ng um ng ent theel mi nts of a a a the connections betweenqthe valve and-stern;

' to the valve; casingrp The valve gv-has an en; la jged h ed,th w rmr i WhQSepu sid a. R Peri hery .1,S b v l d: eesl r madamt to end; as well as ashort lengthof that part of the stem of normal diameter abovethe cong t r'eeted end, ex endsfin w q espend f shapedorifice in the valve. The length of:

I Ethe contracted end of the valve' ste m and advisable, and even I necessary under oer-i m n send tionshfon e vp 'It j" p"i end n n e n l, men ns O t lerelve g aref'suchthatiwhen thevalvestem ffo'rces tion of the device or machine forwhich the 1 *thevalve g, to its seat 0, there is end con method of application; is to relieve all strain upon the segments 70, hereafter described. a Formed in the inside wall ofthe -head diameter are annular grooves m andfn [adapted for the reception of; a :pluralityof, 1

segments 70.

Inately' equal to' the circumference of the tense:eei flizef emy r-lh dgthe v mnitsaseat as; a :1 nibodirnent Io'iymy vention N accompanyi g drawings, in

n eth f conn etien be wve nri't: an its t Atyp cal valve casing a is connectedat l n di? h pipe sections 2; "a d opening d in which the valve is seated." -The Ye sst m f is h ex nd ng: hr u a stuffing box a; secured in the nsualmanner the valve seat) valve stem f is =con-; tracted at its lQfWeIfBnd', andgthis contracted the location of the shoulder h relative to cortact at pbetweenthe stem and thevalve; 0r,' betweenthe taper-shoulder h on the body of the stem and theshonlder i between the en-. larged and contracted parts of the orifice in the valveg; the effect of these two construe:

tions simi'lar in princlple varying only in of vthe valve andin' the immediatelyopposite outside wall of the partof the stern of greater As shown, these segments are threev in number. Their totallength, measured along their outer faces, is approxiste n. Their thickness between inner and I 7 r-r seleewh e s tent into the groove in the valve stem, their s; outer faces are flush or nearly so Withztheradial direction and'eepses their eeter imately horizontal gravity retainin 'at to stem valve spindles "for Three-segment'sedd to the strength.

of the groove in the stem. Extendmg aroun th valyeistem .b twe n-thebese a h 'FQQVeP- Q XQ I spring '7'. When the segments" 70, backed by the spring m, are forced/to the fullest exu fir :facwf the'stem s;-perm gthe-velvet:

to be slipped oiit'othe e lylof its stem. As

soon as the stemis seated in"'the valveso that thegrooves in valve and stem register; the "spring y force's ent segments jk 'iii a P9 tio'ne to extend 1 into the groe ve 'n in {the valve. The l rger and smaller diameters correspohd'ipg "flie'metersfbf t11 e -oiifie in am: the 1 grooves the valve; and the stem of tli'ei saine aviathtfit slightly widerthanjthe width 0% th" eont inea jsleg meats wheveby the va' ve loosely {jourimiftecl amount or niove sure-proper contact betWeeIi the valve 113s seat*'-'ir1'cleehdef1t of "the aociiraey of almemefit' be Ween the-vvalve The I springs are not ipfiispehsable', ,fesp-V eigllyd vvhen, {as is fusuall'y"the fcasefthe sp1 1 1c11e;,' a-s ap'p'lied'in service, is pprqx 1 3 5 .segl'Il e l'lt' in the proper iposl ion. 5

It*is ob'vio1;is that there exists n 'danger, f m servl c'e of th'e separatipnofthe valve and its fstern, and-that the stem eannot be re h .Inoved fiommh mveby; accident or ordinary mea ns,*z ifnd that replacement after Weafjs' inexpensive. '1' I -TheP-inveh,tibh is particularly applloable 5: e ex inw beebydiesi a gang annular external groove, a valve head .ror'valve proper having-a cavity, the Wider pamtwhip i p d w' tpet. 9f $1 valvestempi; greater diameter an theharthe contracted endfof the valve stern, there being an annular; iiit'er'nal the wall part adapted to its seat rowefip'aft ofis adapted to receive] e graoves withlr'r the "grooves end whe w ei 5 th t mi ii d i h f varvenhead adapted tow relieve the In testimony which nvention; Pi -fin. .j" il, T i i1& v.

.v "st-3. 1 a. wime smg :1 "f 5 11s; as ieseshe "a I i a p n and;

ap'teid to relieve the i ieifi ej 

